JP2584561B2 - Vibrating column pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vibrating column pump,
A pipe (vibration pipe) having one end immersed in water and the other end arranged in the air and the other end being communicated with the discharge-side liquid guide pipe through a valve plate elastically contacted by a spring, The present invention relates to a pump that vibrates in a longitudinal direction and pumps liquid through the inside of the pipe.

[0002]

2. Description of the Related Art Conventionally, as a vibrating column pump of this kind,
(A) As a vibrating means of the vibrating tube, there is a vibrating means in which a rotating body having an unbalanced weight is rotated by an electric motor, or an electromagnet is used, and a vibrating tube is fixedly provided at an output portion of these vibrators.
(JP-A-58-144700, JP-A-58-18)
No. 3900)

[0003] Also, (b) a vibrating means is fixed to one end of a leaf spring to the vibrating tube so that vibration of the vibrating tube of a large stroke can be obtained by a vibrating source of a small stroke. There is a configuration in which an electromagnet is fixedly opposed to an elastic body fixed to the electromagnet. (Japanese Patent Application Laid-Open No. 61-275600)
No.)

Further, (c) the vibrating means is constituted such that one of the electromagnets opposite to the permanent magnet via a spring is fixed to the vibrating tube and the other magnet is fixed, so that the permanent magnet of the electromagnet is There is a type in which a magnet opposite to a magnet is urged to have the same polarity in frequency as a permanent magnet so that a magnet fixed to a vibrating tube is moved up and down to vibrate the vibrating tube to pump water. (See Japanese Utility Model Application Laid-Open No. 61-110900)

[0005] (d) The vibrating means is fixed to a linear motor having a slip-thrust characteristic in which the thrust increases from the direction of the larger slip to the direction of the smaller slip and the slip has a maximum thrust near zero. The vibrating tube is fixed to the stationary part, the vibrating tube is arranged opposite to the stator, and the vibrating tube is supported by a bearing movably in the axial direction, and self-excited by the thrust-slip characteristics of the linear motor. Since the vibration system is established, the linear motor is energized to vibrate the vibrating tube. When the vibrating tube rises, the liquid rises from the lower end of the vibrating tube, and when the vibrating tube descends, it is elastically contacted with the upper end of the vibrating tube. In some cases, the liquid is discharged through a valve plate. (Japanese Utility Model Publication No. 60-197300)

[0006]

In the above-mentioned conventional device (a), the required displacement of the vibrating column, for example, 10
mm and it is difficult to set the vibration frequency to a required frequency, for example, 60 Hz. Even if it is manufactured, the vibration means becomes large, and the vibration tube is fixed to the output part of the vibration device. Therefore, there is a problem that the vibration device and the pump are separate devices, and it is impossible to make the device compact.

[0007] In the above (b) and (c), there is a problem that it is relatively difficult to control the amplitude and the excitation waveform.

[0008] In the above (d), the self-excited system is formed so that the efficiency is high, but there is a problem in the controllability of vibration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is possible to prevent leakage and to increase the exciting force. Technical problem (Purpose) to provide a vibrating column pump that facilitates setting and simplifies part shape.
And

[0010]

SUMMARY OF THE INVENTION In order to solve the above technical problem, the present invention provides a liquid guide tube having a lower end immersed in a liquid and an upper end resiliently connected to the liquid guide tube. In a vibrating column pump provided with a vibrating means for vibrating a vibrating tube in a longitudinal direction, a vibrating tube is made of a magnetic material, and permanent magnets having different magnetic poles magnetized in a radial direction are alternately formed on an outer periphery of the vibrating tube. A plurality of shafts are arranged at intervals in the axial direction to form a mover, and a plurality of stators are provided outside the mover by installing an electromagnetic coil in a U-shaped electromagnetic yoke made of a soft magnetic material and forming a stator. A vibrating means is provided which is arranged and fixed in the direction, and which allows the movable element including the vibrating tube to reciprocate slidably in the axial direction.

Further, as described above, the cross-sectional shape is U-shaped,
An electromagnetic yoke having an electromagnetic coil disposed inside the unit is unitized, the units are stacked in the axial direction, and the maximum excitation force generated by the number of stages is variable.

[0012]

In the vibrating column pump of the present invention, a pair of permanent magnets having different minimum magnetization directions and two sets of electromagnetic yoke units are prepared. In this case, the mover is energized by passing an alternating current through the two coil units in opposite directions. The vibration amplitude is controlled by controlling the coil current.

[0013] If a stationary pumping tube is connected to the lower end of the tube shaft opposite to the upper end of the tube shaft where the control valve (valve plate) of the vibrating tube, which is the mover, resiliently contacts, the stationary pump is reciprocated by the reciprocating motion of the vibrating tube. The liquid in the liquid pipe is pumped, passed through a control valve (valve plate) at the end of the vibrating pipe, and discharged into the liquid guide pipe.

In order to increase the discharge pressure of the vibrating column pump, the vibrating force may be increased. Therefore, by increasing the unitized electromagnetic yoke and the permanent magnets opposed thereto, the exciting force is increased or decreased in proportion to the number of the electromagnetic units. Also, the magnetic material part and the permanent magnet that constitute the vibrating tube
And the center axis of the vibrating tube
The magnetic flux forming the magnetic circuit on the cross section (FIG. 1) is
Flux density divided by the cross-sectional area of the magnetic material part of the vibrating tube through which
According to the present invention, the vibration tube itself is made of a magnetic material.
The vibrating tube is made of a non-magnetic material
External dimensions of the vibrating tube compared to those equipped with a soft magnetic material
Are the same, the magnetic flux penetrates through the magnetic material part of the vibrating tube.
Since the area is large, the magnetic flux density is small. Meanwhile, electricity
The magnetomotive force of a permanent magnet that can be imitated
Magnetic circuit).
The air resistance penetrates the magnetic flux (also corresponding to the current)
Vibration is inversely proportional to the size of the
The present invention having a large cross-sectional area through which magnetic flux penetrates the magnetic material portion of the tube
Then, the magnetic resistance in the penetrating portion is reduced. to this
From the residual magnetic flux, or using the same permanent magnet of magnetomotive force,
Since it is possible to increase the generated magnetic flux,
Increase the thrust generated in cooperation with the coil to maximize pumping
It is possible to improve various performances of the pump, such as the amount.
On the other hand, the magnetic flux penetrating the magnetic material part constituting the vibrating tube
When operating points with the same density, the vibrating tube itself is magnetic
In the present invention, which is made of a material, the vibrating tube is made of a non-magnetic material.
Compared to those with cylindrical soft magnetic material attached to the outer periphery
Therefore, the outer diameter of the vibrating tube can be reduced,
The outer shape of the vibration pump can be reduced.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
In the figure, reference numeral 1 denotes a vibration tube made of a magnetic material, and a plate-shaped valve 3 resiliently pressed by a spring 2 is pressed (elastically contacted) at the upper end of the vibration tube 1. A permanent magnet 4 magnetized in the radial direction is fixed to the outer circumference of the vibrating tube 1 in the tube axis direction via a nonmagnetic spacer 5. The permanent magnets 4 having different magnetic pole directions are alternately arranged, and the vibrating tube 1, the permanent magnets 4, and the spacers 5 constitute a mover.

On the other hand, the stator side has a stator coil 7 inside the U-shaped electromagnetic yoke 6 (inner groove) made of a magnetic material.
Are wound in a loop around the vibrating tube 1 and constitute one unit. In the present embodiment, four units are connected in the tube axis direction.

Between the magnetic poles on the inner periphery of the electromagnetic yoke 6,
A spacer 8 made of a non-magnetic material is interposed to seal between the stator coil 7 side and the mover side. The movable element is connected to the lower end of the vibrating tube 1 and the lowermost end of the electromagnetic yoke 6 and, when used, has a spring mounted between the inner wall of the stationary pumping tube 10 into which the suction port 9 at the lower end is inserted into the liquid. The movable element 11 is supported by the stator 11 with a small gap when the actuator is stationary (when operation is stopped) so as to maintain the center stroke of the operating stroke (stroke) in the tube axis direction. . In addition,
In the figure, reference numeral 12 denotes a discharge casing having a discharge port 13, and a valve 3 is provided.
One end of a spring 2 for resiliently supporting the spring 2 is supported.

FIG. 2 is a sectional view of a main part showing a single magnetic pole unit. On the stator side, a stator magnetic pole is formed by a U-shaped electromagnetic yoke 6 and a stator coil 7 made of a yoke of a magnetic material. The movable element side is formed of a permanent magnet 4 radially magnetized and a spacer 5 of a nonmagnetic material. The above-mentioned magnetic pole units are usually used in combination of two or more stages. Further, the overlap lr between the stator magnetic poles 6, 7 and the permanent magnet 4 is equal at both ends of the permanent magnet 4, thereby enabling unitization.

With the above configuration, when an alternating current is alternately applied to each of the electromagnetic coils 7 during operation, an electromagnetic force in the tube axis direction generated by each of the stator magnetic poles 6 and 7 has a radius A reciprocating thrust in the tube axis direction is applied to a mover in which permanent magnets 4 having different magnetic poles magnetized in different directions are alternately arranged,
The vibration tube 1 is moved up and down. The vibration amplitude is controlled by controlling the coil current.

FIG. 3 is a static-displacement-thrust characteristic diagram in which the horizontal axis represents the axial displacement from the neutral position of the movers 1, 4, and 5 at this time, and the vertical axis represents the thrust. Indicates a portion in the opposite direction of displacement-thrust, and the second quadrant indicates a portion in the same direction as displacement-thrust. Basically, the portion of displacement-thrust shown in the first quadrant is in the opposite direction. use.

FIG. 4 is a graph showing the relationship between the number of stages and the thrust with the horizontal axis representing the number of unit stages and the vertical axis representing the thrust acting on the vibrating tube at the neutral position. The thrust varies in proportion to the number of stages. Is shown. Therefore, by adjusting the number of stages of the unit, it is possible to change the magnitude of the thrust acting on the vibrating tube and change the maximum pumping amount.

By the vertical movement of the vibrating tube 1, the following pump action substantially similar to the conventional one is performed. When the valve 3 moves following the vibrating tube 1: (i) Ascent process of the liquid level When the valve 3 moves following the vibrating tube 1 and the vibrating tube moves up and down, the air column in the tube The liquid level in the pipe moves up and down with the change in pressure. This vertical movement of the liquid surface is accompanied by the vibration phenomenon of a kind of spring-mass system composed of the elasticity of the air column and the mass of the liquid column. When the tube is set to the natural frequency of the gas column-liquid column system in the tube, the pressure of the gas column in the tube becomes very high. Therefore, if the valve 3 is opened above a certain set pressure, the valve will open when the air column pressure in the pipe becomes higher than the valve set pressure, and the upper limit of the air column pressure will be maintained at the valve set pressure. The average value of the air column pressure per shaking cycle is equal to or lower than the atmospheric pressure, and the liquid column rises corresponding to the pressure decrease. This occurs continuously and the liquid level rises to the upper end of the vibrating tube 1. (ii) Liquid discharging process After the liquid surface reaches the upper end of the vibrating tube 1, the liquid column pushes up the valve by the inertial force acting on the liquid column in the tube from the vibrating tube 1, and the liquid flows from the upper end of the vibrating tube 1. leak.

When the valve moves without following the vibrating tube 1: (i) When the vibrating tube 1 moves downward in FIG. 1, the valve 3 moves downward with a delay without following it. At the upper end, there is a slight gap between the vibrating tube 1 and the valve 3. (ii) When the vibration tube 1 reaches the lower limit, the valve 3 catches up and closes the valve port. (iii) Next, when the valve port is closed by the valve 3 and the vibration tube 1 rises, the liquid rises together with the vibration tube 1. (iv) When the vibrating tube 1 further descends, the liquid in the vibrating tube 1 does not drop much due to the inertia of the liquid.

By repeating such an operation, the liquid overflows into the discharge casing 12 when the vibrating tube 1 descends in a state where the liquid reaches the upper end of the vibrating tube 1, and moves toward the discharge port 13. It then flows, and is subsequently pumped and discharged.

[0025]

As described above, the present invention has the following advantages. A permanent magnet magnetized in the radial direction and having different magnetic poles is alternately arranged at intervals in the axial direction of the tube on the outer periphery of a vibrating tube made of a magnetic material to form a mover. A plurality of stators each having an electromagnetic coil installed in an electromagnetic yoke of a mold are fixedly arranged in the axial direction of the tube, and a vibrating means for reciprocatingly moving the mover slidably in the axial direction of the tube is provided. The gap between the coil side and the mover side is closed by a small gap, so that no pumping liquid leaks and the size of the device can be reduced, and the application range of the vibrating column pump can be expanded. In addition, the magnetic
Through the conductive material, the permanent magnet, and the U-shaped electromagnetic yoke.
A magnetic circuit is formed on a section including the central axis of the moving tube (Fig. 1).
Of the vibrating tube through which the magnetic flux penetrates.
In the present invention, the magnetic flux density divided by the area is
Is made of a magnetic material.
Compared to those with cylindrical soft magnetic material attached to the outer periphery
If the outer dimensions of the vibrating tube are the same,
The magnetic flux density is small because the cross-sectional area through which the magnetic flux penetrates is large.
It will be cheap. On the other hand, in a magnetic circuit, the magnetic resistance is the magnetic flux
Is inversely proportional to the size of the cross-sectional area through which
The size of the cross-sectional area through which magnetic flux penetrates the magnetic material part of the vibrating tube
In the present invention, the magnetic resistance in the through portion is reduced.
You. As a result, a permanent magnet with the same residual magnetic flux or magnetomotive force
Can be used to increase the generated magnetic flux
Therefore, increase the thrust generated in cooperation with the electromagnetic coil.
Therefore, it is possible to improve the pump performance such as the maximum pumping amount.
It becomes possible. On the other hand, the magnetic material part forming the vibrating tube is
When the operating point with the same magnetic flux density penetrates,
Of the present invention, wherein the vibrating tube is made of a magnetic material.
Made of non-magnetic material and fitted with a cylindrical soft magnetic material on the outer periphery
The outer diameter of the vibration tube can be made smaller than that of
Therefore, it is possible to reduce the size of the vibration pump.
Become.

Also, the electrode yoke of the vibrating means is unitized, the units are stacked in the axial direction, and the maximum vibrating force is varied by the number of stages, so that the maximum pumping amount of the vibrating column pump can be easily changed. And maintenance can be facilitated, and productivity can be improved and the range of application can be expanded.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vibrating column pump showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a diagram showing a relationship between displacement and thrust of a vibration tube shown in FIG. 1;

FIG. 4 is a diagram illustrating a relationship between the number of unit stages and a thrust at a center position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration pipe 2 Spring 3 Valve 4 Permanent magnet 5 Spacer 6 U-shaped electromagnetic yoke 7 Electromagnetic coil 8 Spacer 9 Suction port 10 Stationary pumping pipe 11 Spring 12 Discharge casing

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Mori 4-2-1 Motofujisawa, Fujisawa-shi, Kanagawa Prefecture Inside Ebara Research Institute, Inc. (72) Inventor Hirokuni Hiyama 4-2-2 Motofujisawa, Fujisawa-shi, Kanagawa Prefecture No. 1 Inside Ebara Research Institute Co., Ltd. (72) Inventor Hiroyuki Hashimoto 8-12-16 Tsurugaya, Sendai City, Miyagi Prefecture (56) References JP-A-1-219400 (JP, A)

Claims (2)

(57) [Claims] A vibrating tube having a lower end communicating with the liquid, an upper end sealingly inserted into a liquid guide tube having a discharge port, and an opening in the liquid guide tube; A valve plate abutting on the upper end of the vibrating tube at the other end of the spring abutting and resilient;
In a vibrating column pump provided with a vibrating means for vibrating a vibrating tube in a longitudinal direction, a vibrating tube is made of a magnetic material, and permanent magnets having different magnetic poles magnetized in a radial direction are alternately formed on an outer periphery of the vibrating tube. Arranged at a distance in the axial direction to form a mover,
On the outside of the mover, a plurality of stators each having an electromagnetic coil installed in a U-shaped electromagnetic yoke made of a soft magnetic material are fixedly arranged in the axial direction of the tube, and include the vibrating tube. A vibrating column pump comprising vibrating means for reciprocatingly moving a mover in a tube axis direction. 2. A cross section including a shaft of a stationary side electromagnetic yoke of a vibration means has a U-shape, an electromagnetic coil is arranged inside the U-shape to make the electromagnetic yoke a unit, and the units are stacked in the axial direction. The vibrating column pump according to claim 1, wherein the maximum exciting force generated by the number of stages is variable.